Improvement Method Of Connection Network Of High-speed Rail Hub In Big Cities

In recent years,high-speed railway in China has experienced a rapid development.By the end of 2019,China’s high-speed rail mileage in operation has reached 35,000 kilometers and China has built over 900 high-speed rail hubs.However,transferring from current high-speed rail hub to urban transport systems is not satisfactory.Many passengers still complain about the problems such as transferring in hubs is inconvenient,taking too much time on public transit and so on.Focus on the high-speed railway hubs in big cities,the improvement method of the connection network of the hub is studied in this paper in order to enhance the passenger travel satisfactions.First,based on passenger flow composition and service circle division of the high-speed rail hub,this paper puts forward a method of analyzing the passenger flow characteristics of the high-speed rail hub through multi-source data.In this method,spatial and temporal distribution and the changing of passenger flow are studied from two aspects: external traffic flow and urban traffic flow.Nanjingnan Railway Station is taken as a representative of the high-speed rail hub in large cities to carry out case studies.Based on the analysis of passenger flow characteristics,the suitable connection mode and the composition of the connecting network of high-speed rail hubs in big cities are clarified.Then,the common layout of road connection network and public transport connection network of the high-speed railway hubs are summarized.After that,by analyzing the changing pattern of passenger flow and the requirements of station-city integration concept,it is concluded that the optimal direction of the high-speed rail hub connection network in big cities is to improve the accessibility of public transport and the continuity of slow-moving traffic.For public transport connection network,an optimization method of hub public transport connection network with the goal of improving accessibility is proposed in this paper.According to the public transit-car travel time ratio and passenger volume,areas need to be improved are selected.Then,a route generation model of the feeder bus to the hub and a route optimization model of the feeder bus to metro stations are constructed to improve the public transit service in the selected areas.Finally,Nanjingnan Railway Station is chosen to conduct the case study.For slow-moving traffic network around hub area,an improvement measure with the goal of improving continuity is proposed in this study.Spatial syntax theory is applied to calculate the topological indicators of the slow-moving network.Combined these indicators with the distribution of non-motorized trips in the hub area,the slow-moving network is divided into three levels by clustering.In this way,a slow-moving traffic network with a clear hierarchy is constructed.Similarly,Nanjingnan Railway Station is chosen to apply the case study.This paper analyzes the passenger flow characteristics of high-speed rail hubs in big cities based on multi-source data and summarized the requirements of station-city integration for hub connection services.Based on above analysis,the optimization method of hub connecting network is put forword with the goal of improving the accessibility of public transit network and the continuity of slow-moving network,which has a significance in realizing a convenient hub connection service.